<html lang="en" xmlns:shiro="http://www.pollix.at/thymeleaf/shiro"
      xmlns:th="http://www.thymeleaf.org" >
<head>
    <title>Title</title>
</head>
<body>
<form action="register" method="post">
    username: <input type="text" name="username"> <br>
    password: <input type="text" name="password"> <br>
    <input type="submit" value="注册">
</form>
</body>
</html>